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Disi Water Use for Irrigation – a False Decisionand Its Consequences

机译：迪斯灌溉用水–一个错误的决定及其后果

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摘要

Disi water has been utilized during the last 2.5 decades in irrigation purposes in a very dry country, very short of water resources and where the groundwater in Disi represents the only strategicwater reserve. After 25 years of exploitation, groundwater levels dropped by around 25m signalizing aquifer emptying. Disi aquifer receives an average water replenishment of 50 million cubic meters per year (MCM/y), but this amount is lost as natural outflow. Therefore, groundwater extraction is quasi a mining process. During the last 25 years, about 2 billion m3 of groundwater were exploited from Disi for irrigation purposes with a value of around US$ 2 billion. The only input from Jordan in these irrigation projects has been water. The environmental consequences of groundwater extractions in Disi are: dropping water levels, mobilization of some salty water bodies in geologic units connected vertically with Disi aquifer such as Khureim Formation and irrigation return flow waters with their high salt contents, biocides, and fertilizers concentrations. In the meantime, it has been recognized that Jordan’s drinking water needs in the coming few decades can only be satisfied by utilizing Disi groundwater. But Disi aquifer cannot supply the water amounts for both drinking and irrigation. Recently, thegovernmentdecidednot torenewthelicenses forDisi irrigationprojectswhichisavery sound decision to protect the nationalwater resources. It represents a reversal of a former decision which was based on a wrong policy built on false and distorted information.
机译：过去2.5年来，在一个非常干旱的国家，水资源非常匮乏的地区，迪西的水被用于灌溉目的，而迪西的地下水是唯一的战略性水资源储备。经过25年的开采，地下水位下降了约25m，表明含水层已排空。迪西蓄水层每年平均补给水5000万立方米（MCM / y），但由于自然流出而损失了这一数量。因此，地下水开采是一个开采过程。在过去的25年中，迪斯市开采了约20亿立方米的地下水用于灌溉，价值约20亿美元。约旦在这些灌溉项目中的唯一投入是水。迪斯的地下水开采对环境的影响是：水位下降，与迪斯含水层垂直连接的地质单元（如Khureim地层）中的一些咸水体动员，以及含盐量高，杀生物剂和肥料浓度高的灌溉回流水。同时，人们已经认识到，约旦未来几十年的饮用水需求只能通过利用迪西地下水来满足。但是，迪西蓄水层不能同时提供饮用水和灌溉用水。最近，政府决定不为迪斯灌溉项目续签许可证，这是保护国家水资源的明智决定。它代表了先前决定的逆转，该决定基于错误的政策，错误的政策建立在错误和失真的信息之上。

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